From: Per Forlin <[email protected]> lcpa and lcla are written often and the cache_sync() overhead in writel is costly, especially for wlan where every single network packet (in RX mode) corresponds to a separate DMA transfer.
Signed-off-by: Per Forlin <[email protected]> Reviewed-by: Narayanan Gopalakrishnan <[email protected]> Reviewed-by: Rabin Vincent <[email protected]> Acked-by: Linus Walleij <[email protected]> Signed-off-by: Fabio Baltieri <[email protected]> --- drivers/dma/ste_dma40_ll.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/dma/ste_dma40_ll.c b/drivers/dma/ste_dma40_ll.c index d64b72a..1cfe7ab 100644 --- a/drivers/dma/ste_dma40_ll.c +++ b/drivers/dma/ste_dma40_ll.c @@ -332,10 +332,10 @@ void d40_log_lli_lcpa_write(struct d40_log_lli_full *lcpa, { d40_log_lli_link(lli_dst, lli_src, next, flags); - writel(lli_src->lcsp02, &lcpa[0].lcsp0); - writel(lli_src->lcsp13, &lcpa[0].lcsp1); - writel(lli_dst->lcsp02, &lcpa[0].lcsp2); - writel(lli_dst->lcsp13, &lcpa[0].lcsp3); + writel_relaxed(lli_src->lcsp02, &lcpa[0].lcsp0); + writel_relaxed(lli_src->lcsp13, &lcpa[0].lcsp1); + writel_relaxed(lli_dst->lcsp02, &lcpa[0].lcsp2); + writel_relaxed(lli_dst->lcsp13, &lcpa[0].lcsp3); } void d40_log_lli_lcla_write(struct d40_log_lli *lcla, @@ -345,10 +345,10 @@ void d40_log_lli_lcla_write(struct d40_log_lli *lcla, { d40_log_lli_link(lli_dst, lli_src, next, flags); - writel(lli_src->lcsp02, &lcla[0].lcsp02); - writel(lli_src->lcsp13, &lcla[0].lcsp13); - writel(lli_dst->lcsp02, &lcla[1].lcsp02); - writel(lli_dst->lcsp13, &lcla[1].lcsp13); + writel_relaxed(lli_src->lcsp02, &lcla[0].lcsp02); + writel_relaxed(lli_src->lcsp13, &lcla[0].lcsp13); + writel_relaxed(lli_dst->lcsp02, &lcla[1].lcsp02); + writel_relaxed(lli_dst->lcsp13, &lcla[1].lcsp13); } static void d40_log_fill_lli(struct d40_log_lli *lli, -- 1.7.12.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
